1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64098dd8f7b14c0e9f5abe3a9b9fd8221d7374b4644059f315afaf215da132. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9502905a-343f-4976-b2aa-d3fa01ace7a2.json and https://artists.proofprofile.net/proofs/artist/9502905a-343f-4976-b2aa-d3fa01ace7a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d66283cb66ec4036f7f1e6562bfe1aa6a28ea62fd9066aa3a6cc7ce56aa0994. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d298a5574cb4aaafc291a21f2ed81fa838d64893d8d7a484ee826d558ca8fe8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a11a41c7e8a6dc2f0a23b6958b4cf0a50bb8a02355dc3d81f064889b50d3c7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a89b851c53a218276d003898ce2bb8db8451421ca4a4a66684b85fcc5ebb30. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a952fc350986c400d5d679c50cf279f2308812e83a8cd29a3999c7cfa0662f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a667ec6565d1c3d8c4c8709f9bd6a012fa158cbad81933840ea20f7d32c237f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ff3f40f5a16fe008275681119d2a1a02da61e32a9e51b60ffdac943a72da95. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42521683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bcdcf0875c8e8f84bd834cdcfe598af4988c362efd03dbfe49d8dc3a52b13d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2451132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada17180032fc9b68476197cc831ee9d9adfd9b4c5283aedd4fa47edacb2ab9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182402465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be92a4e79ee1cd38c2603a48402b8928bfabaf08341ae44ff06478f84004f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22466236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8913e998de66c74fb011c1f48856f7e31b4ae24b79303bb39148a4e1aff8d01. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2338231.
Dillagi (From "MTV Hustle 03 Represent Episode 2")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b7fdb07196f8dbc262e964f3a4fd0543e1a816acf9e058c30e754f5577b123. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS182303056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670c7da0aaf640f987b97810c6e20a7b96a8caef39accbbb4a52eae2f7049e2c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6K2383359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d8a3ea70cbeec3a89da039274a2a432018c08b5ddb2661ebc68b0940e2258. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52316677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7328224e5f7e22cb0e6f433f0004605f8c1b245d0d2315b22cd14cc04b038763. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62381895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a847037be080a139ed19eadba0dc328a63225e03128c5cbc3085e8102197360. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2207667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d77355a87e16a1bae58655a550ca87d7c2f4882102407f62abcef4c6730a2fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2271527.